Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Fail-safe Chart

Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual / Engine & Hybrid System / 2gr-fks (engine Control) / Sfi System / Fail-safe Chart

FAIL-SAFE CHART

If any of the following DTCs are stored, the ECM enters fail-safe mode to allow the vehicle to be driven temporarily or stops fuel injection.

DTC Code

Component

Fail-Safe Operation

Fail-Safe Deactivation Condition

P001100

P001107

P001500

P002100

P002107

P002500

VVT system
  • Idle up (control of combustion worsening).
  • Stopping fuel-cut control.

Pass condition detected

P003012

P003013

P005012

P005013

P101A9E

P103A9E

Air fuel ratio sensor heater

The ECM turns off the air fuel ratio sensor heater.

Engine switch off

P003612

P003614

P005612

P005614

P102A9E

P105A9E

Heated oxygen sensor heater

The ECM turns off the heated oxygen sensor heater.

Engine switch off

P008700

P008800

P123513

Fuel pump assembly (for high pressure side)
  • The ECM performs fuel-cut when the engine speed and engine load are high.
  • Fuel pressure is set to 200 kPa.

Engine switch off

P010012

P010014

Mass air flow meter sub-assembly

The ECM calculates fuel injection volume according to the engine speed and throttle valve position.

Pass condition detected

P011011

P011015

Intake air temperature sensor

The ECM estimates the intake air temperature to be 20°C (68°F).

Pass condition detected and then engine switch turned off

P011511

P011515

Engine coolant temperature sensor

The ECM estimates the engine coolant temperature to be 80°C (176°F).

Pass condition detected

P012011

P012015

P01201C

P022011

P022015

P060444

P060604

P060629

P060647

P060A47

P060B49

P060D49

P060E49

P061E49

P065714

P06579E

P160700

P210018

P210019

P211172

P211173

P211900

P211904

P211977

P21352B

Electronic throttle control system

The ECM cuts off throttle actuator current and the throttle valve is returned to a 7° throttle position by the return spring.

The ECM then adjusts the engine output by controlling fuel injection (intermittent fuel-cut) and ignition timing in accordance with the accelerator pedal angle to allow the vehicle to be driven at a low speed*1.

Pass condition detected and then engine switch turned off

P019011

P019015

Fuel pressure sensor (for high pressure)
  • The ECM performs fuel-cut when the engine speed and engine load are high.
  • Fuel pressure is set to 200 kPa.

Pass condition detected and then engine switch turned off

P020113

P020213

P020313

P020413

P020513

P020613

P062D13

ECM (injector driver)

The ECM performs fuel-cut when the engine speed is 2000 rpm or more.

Pass condition detected and then engine switch turned off

P030000

P030027

P030085

P030100

P030200

P030300

P030400

P030500

P030600

*2
  • Fuel injector assembly
  • Electronic throttle control system

When a catalyst-damaging misfire occurs (MIL blinking), the following fail-safe operation is performed for catalyst overheat malfunction prevention.

  1. Under a low load and at a low engine speed:

    - Fuel cut is performed on the malfunctioning cylinder.

  2. Under a high load and at a high engine speed:

    - Throttle valve opening angle control is performed.

    - Fuel cut is performed on all cylinders or the malfunctioning cylinder.

Pass condition detected and then engine switch turned off

P032511

P032515

P033011

P033015

Knock control sensor

The ECM sets the ignition timing to maximum retard.

Engine switch off

P05042B

Stop light switch assembly

The accelerator pedal opening angle is fixed when there is an accelerator pedal malfunction or history of a malfunction.

Pass condition detected and then engine switch turned off

P056014

ECM +B circuit

Generator command is maintained.

Pass condition detected and then engine switch turned off

P107A11

P107A15

Fuel pressure sensor (for low pressure side)
  • Fuel pump (for low pressure side) control is maintained.
  • Output is limited.

Pass condition detected and then engine switch turned off

P21CF13

P21D013

P21D113

P21D213

P21D313

P21D413

Fuel injector assembly (for port injection)

The ECM performs fuel-cut when the engine speed is 2000 rpm or more.

Pass condition detected and then engine switch turned off

P212012

P212014

P21201C

P21201F

P212099

P212512

P212514

P21251F

P21382B

Accelerator pedal position sensor

The accelerator pedal position sensor has 2 sensor circuits: Main and Sub.

If either circuit malfunctions, the ECM limits the engine output.

If both circuits malfunction, the ECM regards the accelerator pedal as being released. As a result, the throttle valve is closed and the engine idles.

Pass condition detected and then engine switch turned off

P223711

P223712

P223713

P223716

P223717

P22371B

P224011

P224012

P224013

P224016

P224017

P22401B

P225111

P225112

P225411

P225412

Air fuel ratio sensor

Air fuel ratio feedback control is stopped

Pass condition detected and then engine switch turned off

HINT:

  • *1: The vehicle can be driven slowly when the accelerator pedal is depressed firmly and slowly. If the accelerator pedal is depressed quickly, the vehicle may speed up and slow down erratically.
  • *2: Misfire-related fail-safe operations occur when catalyst overheat malfunctions occur.
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